Motion in bar means a motion that bars an action as trial or prosecution. For example, the plea of double jeopardy amounts to an action in bar. [United States v. Jorn, 400 U.S. 470, 478 (U.S. 1971)].Such motions are commonly seen in states such as Illinois and Georgia.
One requisite of a motion in bar is met when a dismissal by its own force ends the cause and exculpates a defendant, rather than merely abating the prosecution on account of some normally curable defect. [United States v. Blue, 384 U.S. 251, 254 (U.S. 1966)].